If your iPhone becomes defective during the warranty period, you should receive a new unit, not a refurbished one.
You would have thought so, but this cheap ass approach has been Apples policy for years. How do you think they make so much money. The will churn out used bits for as long as possible. No true cost to them what so ever.
This is exactly how every major vender and retailer operate. Had something fixed somewhere before? Refurbished parts.
----------
-What if Apple followed Best Buy's model of sending your phone out to be repaired and/or replaced with an obviously used refurb? My brother went through this and was without his phone for 2 weeks!
I work for Best Buy, I've been there a year now and our rapid exchange process always takes 3 days or less....